Regarding Stepper motor .

Hi ! Am working on stepper motor using Arduino UNO with V2 Motor shield. Am using 2 Stepper motor for doing raster scanning i.e Stepper1 motor just moves one step and stops till the stepper 2 reaches end of the scanning board i.e 15500steps and stops for sec till Stepper 1 moves one step and stops till Stepper 2 comes back to the same start position. I have the code below but problem is speed is too slow and i couldn't find any functions to increase the speed And also i have trouble putting in loop ..
void loop()
{
stepper1.run();
stepper2.run();

char letter = 'a';
switch (letter) {
case 'a':
stepper1.moveTo(10);// This is the main part like i explained above but its reducing the speed
delay(100); //
stepper2.moveTo(1000);//
step1spot=10;
step2spot=1000;
stepper1.moveTo(10);
delay(10);
stepper2.moveTo(-1000);
break;
}
if (stepper1.distanceToGo() == 0 && stepper2.distanceToGo() == 0) {
delay(1000);
stepper1.moveTo(-step1spot);
stepper2.moveTo(-step2spot);
stepper1.run();
stepper2.run();
}
}
And am also struggling to put the loops ...
Please do help me with this

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your entire code.
It will be formatted in a scrolling window that makes it easier to read.

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Also post a link to the specs of your stepper motors.

Thanks.. Tom... :slight_smile:

rakshithaguna:
problem is speed is too slow and i couldn’t find any functions to increase the speed And also i have trouble putting in loop …

You have not posted a complete program and the parts you did not post are relevant. Post the complete program in your next Reply.

These links may help with stepper motors
Stepper Motor Basics
Simple Stepper Code
also look up the AccelStepper library

and have a look at Several Things at a Time and Planning and Implementing a Program for organizing your code.

…R

PS please post your program using the code button </> so it looks like this. See How to use the Forum

Am working on stepper motor using Arduino UNO with V2 Motor shield.

That is a very poor choice for controlling stepper motors. A real stepper driver shield, per motor, would be a much better choice. Not only would you waste a lot less energy, but you'd be able to adjust the current supplied to each stepper motor, improving the torque and speed of the steppers.

Hey !

Below is the code

 #include <AccelStepper.h>
#include <Wire.h>
#include <Adafruit_MotorShield.h>
#include "utility/Adafruit_MS_PWMServoDriver.h"

Adafruit_MotorShield AFMSbot(0x61); 
Adafruit_MotorShield AFMStop(0x60);

// Connect two steppers with 200 steps per revolution (1.8 degree)
// to the top shield
Adafruit_StepperMotor *myStepper1 = AFMStop.getStepper(200, 1);
Adafruit_StepperMotor *myStepper2 = AFMStop.getStepper(200, 2);

void backwardstep1(){
  myStepper1->onestep(BACKWARD ,DOUBLE);

}
void backwardstep11(){
  myStepper1->onestep(BACKWARD ,DOUBLE);
  
}

void forwardstep2(){
  myStepper2->onestep(FORWARD,MICROSTEP);
}
void backwardstep2(){
  myStepper2->onestep(BACKWARD,MICROSTEP);
}
AccelStepper stepper1(backwardstep1, backwardstep11);
AccelStepper stepper2(backwardstep2,forwardstep2);


void setup()
{
  AFMStop.begin();
  AFMSbot.begin();
  
  stepper1.setMaxSpeed(10000.0);
  stepper1.setAcceleration(100.0);
 
  
  stepper2.setMaxSpeed(10.0);
  stepper2.setAcceleration(40.0);
  

}

void loop()
{
  stepper1.run();
  stepper2.run();
  int step1spot = 0;  //an experiment where i tried using stepspot variables to
  int step2spot = 0;  //keep track of motor location; probably unnecessary
  
  char letter = 'a';
    switch (letter) {
      case 'a':
      stepper1.moveTo(10);
      delay(100);
      stepper2.moveTo(1000);
      break;
     
      case'f';
      stepper1.moveTo(10); 
      delay(10); 
      stepper2.moveTo(-1000);
      break;
    }   
    if (stepper1.distanceToGo() == 0 && stepper2.distanceToGo() == 0) {
      delay(1000);
      stepper1.moveTo(-step1spot);
      stepper2.moveTo(-step2spot);
      stepper1.run();
      stepper2.run();
    }
}

This is code am using , but speed is too slow .Let me know for any change or it would be great if someone can help me with the function through which i can increase the speed of motor

  char letter = 'a';
    switch (letter) {

Is it just me, or is the switch irrelevant?

These 2 lines should not be inside any IF. They should just be in loop()

      stepper1.run();
      stepper2.run();

There should be no delay()s anywhere. The loop() function needs to be able to repeat as fast as possible in order to call stepper.run() as often a possible.

Have a look at how millis() is used to manage timing without blocking in Several things at a time.

...R